Add link-test testing

imag-link/tests/link-test.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+source $(dirname ${BASH_SOURCE[0]})/../../tests/utils.sh
+source $(dirname ${BASH_SOURCE[0]})/utils.sh
+
+default_entry() {
+    cat <<EOS
+---
+[imag]
+links = []
+version = "0.1.0"
+---
+
+EOS
+}
+
+mktestentry() {
+    mkdir -p ${STORE}
+    default_entry > ${STORE}/$1
+}
+
+test_link_modificates() {
+    mktestentry "test~0.1.0"
+    mktestentry "test2~0.1.0"
+
+    imag-link --from "test~0.1.0" --to "test2~0.1.0"
+
+    if [[ "$(default_entry)" -eq "$(cat_entry 'test~0.1.0')" ]] ||
+       [[ "$(default_entry)" -eq "$(cat_entry 'test2~0.1.0')" ]]
+    then
+        err "Entry was unmodified after linking"
+        return 1;
+    fi
+}
+
+invoke_tests            \
+    test_link_modificates
+